// Copyright 2025 Justine Alexandra Roberts Tunney
//
// Permission to use, copy, modify, and/or distribute this software for
// any purpose with or without fee is hereby granted, provided that the
// above copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
// WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
// AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
// DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
// PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
// TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.

#include <errno.h>
#include <limits.h>
#include <stdlib.h>

#define TEST(x) \
  if (!(x))     \
  return __LINE__

int main() {
  TEST(atoi("") == 0);
  TEST(atoi("-") == 0);
  TEST(atoi("0") == 0);
  TEST(atoi("1") == 1);
  TEST(atoi("+1") == 1);
  TEST(atoi("-1") == -1);
  TEST(atoi("1-") == 1);
  TEST(atoi("--1") == 0);
  TEST(atoi("16 32") == 16);
  TEST(atoi("\t 16") == 16);
  TEST(atoi("\v 16") == 16);
  TEST(atoi("\n 16") == 16);
  TEST(atoi("\r 16") == 16);
  TEST(atoi("rr 16") == 0);
  TEST(atoi("0123456789") == 123456789);
  TEST(atoi("2147483647") == INT_MAX);
  TEST(atoi("-2147483648") == INT_MIN);
  TEST(atoi("-2147483647") == INT_MIN + 1);
  TEST(!errno);
}
